Compressor



June 17, 1930.

A|: P. HEATH COMPRESSOR Filed Jan. 6, 1926 June 17, 1930. D. p VHEATH 1,764,953

COMPRESSOR Filed Jan. 6, 192e 2 Sheets-sheet 2 uenor @Q h T Patented June 17, 1930 nnnosnyimnmng. on nnnorn. ivrIcHIGur-N` COMPRESSOR p Application led January4 6,11928. Serial No. 79,559.

This invention relates to a compressorof the typewhich may'be used foncoinpressing' The compressor is not: limited. in use.

the stroke of the pistoni inone direction the i gas' to be compressed" will be drawn through the piston into the cylinderand on the" stroke of the" piston in. the opposite direction the gases willbe c'ompressedand forced outwardly to any suitable reservoir or other container for the compressed gas. Another object of the invention is to construct a compressor which, on the compression stroke of its piston, will completely and wholly eject all of the gas in the cylinder therefrom, a Y novel construction being provided for this purpose which at the extreme end of the compression stroke of the piston forces all of the gas within the cylinder out and leaves no space between the check valve which holds compressed gas against return to the cylinder and the piston so that a very high efficiency is attained.

For an understanding of the invention whereby these results as wellas many others not at this time particularly stated are attained, reference may be had to the following description taken in connection with the accompanying drawings in which:

Fig. l is a partial side elevation and vertical section of the compressor made in accordance with my invention.

Fig. 2 is an enlarged fragmentary vertical section through the upper end of the compressor cylinder, the piston being at the extreme of its compression stroke.

Fig. 3 is an under plan view of the housing head over the check valve plate located at the upper end of the compressor cylinder.

Fig. 4 is a plan view ofone of the elements of the valve means used at the upper end of the compressor piston'. Y

. Fig. 5 is a plan of the check valve plate at the upper end of the compressor cylinder.

Figi. Gis aplan view of; a Washer associated with tlie member shown inFig; 4; and? i Fig. 7 is a side elevation of one' of the' spiral band springs used to normally hold the check valve shown in Figi 5 in lower position.

Lilie reference'characters referto like partsV inthe different iigures of theA drawings;

In the construction ofv the compressor, ai crank' case is" provided havin-ga closedend, the' opposite end of' which is" also closed by a' casting. 2.' The shaftV 3*V of the compressor, which is driven from any' suitablesource of power, is connected to orf'ormed with the usual crank indicatedin dotted lines in Fig. l to which theconnectin-gl rod 4i is secured in the usuall manner, the` same extending up wardly intoY the'lowerendtof a cylinder 5l located over'the-cran-l case 1l The upper' endJ of the cylinder 5 :carries headlplatefhaving acentralopening thereimthis opening 'being offfrustosconicalsliape as shown; e Overtheplatef, aheadfSis positionedf and? both vthe# headi and the Vplates are siecuredto the cylinder by` n'reans of the usual cap screws shown- 'n Figs. land'. 2.' The'head S-s'forrned at itsimiddleportion with a raised sectionV 8'a under which* is a chamber9made4 between the-'head 8I and the-plate 6 over the opening. 75 described,qandan outlet pipe-l() Athreads intfofthe upper end of theraised sec-` tion S'Eof .theJ head 8. Y

The pistonjlliis located within the cylinder and isadapt'ed'to bereciprocated inthe cyl; inder, lia-vingy the usual wrist' pin connection lQ-passing throughlthe-upper end of the; connecting-,r0d4- Intherhead 13 ofthe piston a number of vertical openings 14 areV ina-de aiound-ftfhe-central Vertical axis'ofsaidiliead and-throughthecenter of the 'liead'l anV open'- ing is' made "for the passage ofi a threaded'stem 15' whichreceive'sanut lb'at'itslower end and is equipped with. a frustrofconical head 17 at A washer 18; of: thin metalis located around `vthe steml' and lies overthe upperendsvof its upper end abovethehead 113 of the piston f central opening for the passage of the stein 15, and, at spaced apart points in its circuin` ference, having spring fingers V partially cut therefrom and bent downwardly so as to lie in a plane below the plane of the body of part 19. These fingers rest on the upper side of the washer 18 and normally hold the washer in lower position where it will close the upper ends of the vertical passages 14.

A at valve plate 2l, circular in form, is located over the upper end of opening 7 through the head plate 6, previously described. A housing member 22 for the valveV plate lies within the chamber 9 andgis permanently secured to the plate 6 at its upper side by means of screws as shown in Fig. 2. In the under side of the housing member 22 a shallow. circular recess 28 is made and a plurality of openings 24 are bored upwardly from therecess into the member 22 in which spiral band springs 24 are inserted the same bearing at their lowery ends with pressure against the plate 21 so as to force the same in a downward direction. In the flange surrounding the recess -3 in the lower side of the housing member 22 a number of radial'shallow and wide outlet slots arecut the purpose ofrwhich will later appear. V

The gas which is to be compressed is received within the crank case 1 the details of construction by whichY it is carried vintosaid crank case not being shown. It is evident that upon the down stroke of piston 11 valve y plate 21 will close'the upper end of the opening 7 through the ypressure of the springs 24, in addition to which there is the pressure of the compressed gas whatever it may be above such plate. As thepiston moves downwardly the washerl 18 will be elevated against the Vforce ofthe springngers20 sol that the gas below the piston can move upwardly through the openingll and into the cylinder 5 above the piston. 'On the reverse strokeof the piston the Vwasher or ring 18 will drop to the closing positionifor the passages 14, being normally forced thereto by` spring fingers 20 and aided by the higher pressure of the gas above the piston so that o-rthe gas above the piston to escape it must pass through the opening 7, elevating the plate 21 against the force `of springs k24, and Vpassing into the chamber 9 through the slots 25 and thence outwardly through the pipe 10 to any suitable container, reservoir or in refrigerating apparatus tothe co-il or other apparatus where it spaces between the piston and the check valve plate wherein gas can be raised to a high pressure and then on the return stroke of the piston allowed to expand and thus reduce the efficiency of the apparatus. In addition the valve mechanisms used are particularly simple and eiective and from their construction are durable'and are not liable to get out of order.y The invention is dened in the 4appended claims and is to be considered as comprehensive on all forms of structure coming within their scope.

I claim: Y

A compressor comprising, a cylinder having an open end, a piston reciprocable in said cylinder, a plate co-vering the open end ot' said cylinder and having a passage therethru, a disk located over said passage on the outer side of said plate, a housing member having a recess in its under side and outlet openings therefrom, said member being detachably fastened against the outer surface of saidv plate over said disk, a cylinder head located over said plate and having a chamber enclosing said housing and alsohaving a passage communicating with said chamber, and means for fastening both said cylinder head and said plate to the cylinder.

In testimony whereof I affix my signature.

DELOS P. HEATH.

is permittedto expand and thus wthdraw Y' heat from the surrounding space and erform its refrigerating functions.,a It will e noted f i that at the completion of theV up stroke of the piston the .head 17 completelyA fills thev opening-7 and its upper end bears against the lower side' ofthe plate 21.V All of the gas Vwithin the cylinder aboveV the piston 1l. is

forcedbeyond and past 'the plate 2 1. There is no loss or y.efficiency Vor `capacity due to 

